epistolic

or ep·i·stol·i·cal

[ ep-uh-stol-ik or ep-uh-stol-i-kuh l ]
/ ˌɛp əˈstɒl ɪk or ˌɛp əˈstɒl ɪ kəl /

adjective

Origin of epistolic

1735–45; < Latin epistolicus < Greek epistolikós suited to a letter. See epistle, -ic